ZX Spectrum Sound Peripherals

Crescent 128 Quick Disk Interface

Notes
Another alternative to the microdrive claiming upto 20 times the speed.
Stores 128K of data and can read 65K in 4-8 seconds.
Has RS232 port and RGB port.
Allows only 2 drives to be attached to the interface.
An enhanced version (256i) could store 256K and cost £229.90